PENSION PLAN - Plan Asset Allocations (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Pension Plan Asset Allocations
Plan Assets	100.00%	100.00%
Estimated Amortization Over Next Fiscal Year
Estimated net loss (gain) expected to be amortized from accumulated other comprehensive income into net periodic cost	$ 306
Cash
Pension Plan Asset Allocations
Plan Assets	9.00%	16.00%
Fixed income
Pension Plan Asset Allocations
Plan Assets	23.00%	28.00%
Alternative investments
Pension Plan Asset Allocations
Plan Assets	13.00%	9.00%
Domestic equities
Pension Plan Asset Allocations
Plan Assets	32.00%	28.00%
Foreign equities
Pension Plan Asset Allocations
Plan Assets	23.00%	19.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
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